Hi Rusty,
I was intrigued by the number as I have an extra dizzy FEK 12127 A2 which is a stock 57 312 w/o tach drive.
I did some digging around on some of the other forums and it "appears" that your "C2" is from the 57 Turnpike Cruiser. Another person had one that was a tach drive with dual points. Any dual points in yours?
Someone found a "C" in an old parts book but not a "C2". The "C" in the parts book was w/o a tach drive so the thought was that the "C2" was with the drive. Generally the number on the end of the letter shows a later model of the same part. A bit curious that it would be a different part with the tach drive and still be a "C" and not a different ending letter.
For example the FEK 12127-B is for the 312 Bird - w/ tach drive.
There is also a 57 Merc FEK 12127-D with a tach drive in my Ford Parts Interchange guide.
From what was said on the other forum the dizzy will work if it has a 14 tooth 312 gear on it and not the 15 tooth 368 gear. How many teeth do you have?
The gear can be changed of course.
Hope that helps and did not add to the confusion.
Jim
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